Abstract: With the construction of more and more deep buried tunnels with extremely large length, the mutual action among the complex geological environments in which the surrounding rock mass is situated can not be ignored anymore. In this article, through dealing with permeability and thermal physics of the rock mass surrounding tunnel by equivalent continuum method, a mathematical model on coupling of temperature field with seepage field in surrounding rock mass is established. At last, the model is checked by applying in the practice of Qinling tunnel project.